volume or capacity converter

What is the international acronym for each of these two volume or capacity units?

Prefix or symbol for Nutritional Cup US is: food labeling cup

Prefix or symbol for coomb UK is: none - old imp.

Technical units conversion tool for volume or capacity measures. Exchange reading in Nutritional Cups US unit food labeling cup into coombs UK unit none - old imp. as in an equivalent measurement result (two different units but the same identical physical total value, which is also equal to their proportional parts when divided or multiplied).